AirHint found the following cheapest return flights from Seattle (SEA) to Stockholm (ARN) in December 2025 (see full year).
Return flights
| 09 Dec - 16 Dec | SWISS | ||
| 10 Dec - 17 Dec | SWISS | ||
| 21 Dec - 25 Dec | British Airways | ||
| 20 Dec - 28 Dec | Frontier Airlines |
Also check the deals for one-way flights from Seattle to Stockholm in December.
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